Bump to v0.12.rc.11 [ci skip]
Bump to v0.12.rc.11 [ci skip]

matrinox/appsignal-ruby,stijnster/appsignal-ruby,matrinox/appsignal-ruby,appsignal/appsignal-ruby,matrinox/appsignal-ruby,appsignal/appsignal-ruby,stijnster/appsignal-ruby,appsignal/appsignal-ruby,appsignal/appsignal-ruby,appsignal/appsignal,stijnster/appsignal-ruby,appsignal/appsignal